CVE-2021-21806 Explained : Impact and Mitigation

Webkit WebKitGTK 2.30.3 is affected by a critical use-after-free vulnerability that allows for remote code execution. Users visiting a malicious website can trigger this vulnerability, posing a significant risk to confidentiality, integrity, and availability.

Understanding CVE-2021-21806

This CVE refers to an exploitable use-after-free vulnerability in WebKitGTK browser version 2.30.3 x64.

What is CVE-2021-21806?

A use-after-free vulnerability in WebKitGTK browser version 2.30.3 x64 can lead to remote code execution if a victim visits a specially crafted HTML web page.

The Impact of CVE-2021-21806

The vulnerability poses a high risk to affected systems, allowing attackers to remotely execute code, compromising confidentiality, integrity, and availability.

Technical Details of CVE-2021-21806

The technical details of the vulnerability include:

Vulnerability Description

The vulnerability arises due to a use-after-free condition in WebKitGTK browser version 2.30.3 x64, enabling remote code execution.

Affected Systems and Versions

Webkit WebKitGTK 2.30.3 is the specific version affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking users into visiting a specially crafted HTML web page, triggering the use-after-free condition.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-21806, consider the following steps:

Immediate Steps to Take

Users should avoid visiting untrusted or malicious websites and exercise caution when clicking on links.

Long-Term Security Practices

Regularly update the WebKitGTK browser to the latest version to patch known vulnerabilities and improve overall security.

Patching and Updates

Apply patches provided by the vendor promptly to address this specific use-after-free vulnerability in WebKitGTK 2.30.3.